Dear list,
the problem is hard to describe but TABLE breaking behaves in a weird way. Please try out the MWE below. It is reproducible on TL2016 and latest beta.
Cheers, Henri
--- MWE ---
\starttext
\dorecurse{10}{\input lorem}
\startplacetable
[
title={Landscape table},
%location={page,split,90},
location={split,90},
]
\startTABLE[split=repeat,option=stretch,textwidth=\textheight]
\startTABLEhead
\NC[nx=6,align=center] Beschriftung \NC\NR
\stopTABLEhead
\startTABLEnext
\NC[nx=6,align=center] Beschriftung (Fortsetzung) \NC\NR
\stopTABLEnext
\startTABLEbody
\dorecurse{50}{
\NC Merkmal \NC Daten \NC Daten \NC Daten \NC Daten \NC Daten \NC\NR
}
\stopTABLEbody
\stopTABLE
\stopplacetable
\dorecurse{10}{\input lorem}
\stoptext